Convenient Display: This indoor thermometer features three faces that represent how people feel at different temperature and humidity levels. (The smiling face indicates a temperature of 20-26°C and a relative humidity of 40-70% RH.) Precise Response: The thermometer and hygrometer have ventilation holes for fast and accurate readings. It measures temperatures from -10 to 50 degrees Celsius and relative humidity from 20% to 95%, allowing you to easily read both temperature and humidity. Easy to Read: The indoor hygrometer's LCD display shows clear and easy-to-read numbers. Buttons on the back allow you to switch between Celsius and Fahrenheit. It also includes a stand and a magnetic base for easy placement almost anywhere. Low Energy Consumption: Thanks to its energy-efficient display, this household thermometer can operate for at least a year and a half. Fast updates: The digital indoor thermometer updates every 10 seconds, keeping you up-to-date with the latest temperature and humidity measurements.